What is the difference between paper size and page margins in word

Paper size is how big or small the paper is whilst paper margin is the staight lines or shapes at the sides of a page or sheet.

explained below

Explanation:

Paper size refers to the outside area of the page. It indicates how big or small the paper is while paper margin is denoted by the straight lines at the sides of a page. It is basically the space between the text and the edge of the page.

We generally writing after the paper margin.

Page margins determine the maximum width of the text.

As page margins increase, line length also decreases.

Paper size and page margins are automatically set on some software in the computer.